Navien NP Condensing Tankless Gas Water Heater - Service Manual

4.6.10. Manifold
PABCR180AMF_001
Navien Part No.
Function
Failure Event
Effects
Error Code
Diagnostic
Color /
Number of wires
PABNR/NP180AMF_001
PABCC210AMF_001
PABCC210AMF_002
1. The manifold distributes gas from the gas valve to the burner.
2. To provide proper quantity of gas to burner in each stage.
3. There are 3 zones within the manifold, to ensure efficient combustion
operation.
1. Dust deposit on the manifold.
2. Gas leakage from a failed manifold.
3. Ignition failure.
4. Imperfect combustion.
1. The burner cannot receive proper gas flow from the manifold, which can cause
poor combustion in the combustion chamber. In this case, the flame rod will
detect an improper flame condition and the PCB board will take safety
measures.
2. Gas leakage from the manifold.
E003, E004, E012
Check Point
1. Visual inspection: Connection and/or breakage of wires.
2. Voltage check: Check range of voltage shown below.
1. Yellow – Yellow : On : DC 83 ~ 120 V, Off : 0 V
2. Red – Red : On : DC 83 ~ 120 V, Off : 0 V
N/A
Model : 180
Nozzle
Solenoid Valve
Model : 210/240
Fuel Gas Supply
2 Stage
1 Stage
3 Stage
©Navien America Inc. 2010
52
NR/NP series service Manual
Version 2.0